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Table 1 Characteristics of the patients: entire sample, patient at risk screened for a delirium, patient at risk with and without a delirious state

From: A hospital-wide evaluation of delirium prevalence and outcomes in acute care patients - a cohort study

  Entire sample Screened sample – patient at risk for a delirium
Endpoints / Variables Total Not screened (not at risk for a delirium) Screened (at risk for a delirium) Non-delirious DOS < 3, ICDSC < 4 Delirious DOS ≥ 3, ICDSC ≥ 4
Total n (%) 29′278 18′372 (62.8) 10′906 (37.2) 7′837 (71.9) 3′069 (28.1)
Age [years] mean (SD) 54.7 (19.2) 47.0 (16.9) 67.6 (15.4) 67.3 (15.2) 68.4 (15.8)
Gender [male] n (%) 14′147 (48.3) 7′672 (41.8) 6′475 (59.4) 4′601 (58.7) 1′874 (61.1)
Residency prior admission n (%)
 Home 25′842 (88.3) 17′003 (92.5) 8′839 (81.0) 6′730 (85.9) 2′109 (68.7)
 Other hospital 2′386 (8.1) 928 (5.1) 1'458 (13.4) 813 (10.4) 645 (21.0)
 Nursing home 402 (1.4) 121 (0.7) 281 (2.6) 125 (1.6) 156 (5.1)
 Other residency 462 (1.6) 245 (1.3) 217 (2.0) 99 (1.3) 118 (3.8)
 With home care 186 (0.6) 75 (0.4) 111 (1.0) 70 (0.9) 41 (1.3)
 Emergency admission n (%) 13′862 (47.3) 8′727 (47.5) 5′135 (47.1) 3′280 (41.9) 1′855 (60.4)
Type of care n (%)
 Internal / general medicine 7′198 (24.6) 4′218 (23.0) 2′980 (27.3) 2′141 (27.3) 839 (27.3)
 Cardiac surgery 1′392 (4.8) 249 (1.4) 1′143 (10.5) 680 (8.7) 463 (15.1)
 Neurology 1′516 (5.2) 517 (2.8) 999 (9.2) 637 (8.1) 362 (11.8)
 Neurosurgery 968 (3.3) 173 (0.9) 795 (7.3) 480 (6.1) 315 (10.3)
 Trauma surgery 2′090 (7.1) 1'360 (7.4) 730 (6.7) 462 (5.9) 268 (8.7)
 Other service 16′114 (55.0) 11′855 (64.5) 4′259 (39.1) 3′437 (43.9) 822 (26.8)
ICD-10 chapter n (%)
 IX. Diseases of circulatory system 4′538 (15.5) 1′218 (6.6) 3′320 (30.4) 2′247 (28.7) 1′073 (35.0)
 II. Neoplasms 5′665 (19.3) 3′182 (17.3) 2′483 (22.8) 1′915 (24.4) 568 (18.5)
 XIX. Injury/poisoning of external cause 2′997 (10.2) 1′938 (10.5) 1′059 (9.7) 653 (8.3) 406 (13.2)
 XI. Diseases of the digestive system 1′954 (6.7) 1'326 (7.2) 628 (5.8) 448 (5.7) 180 (5.9)
 VI. Diseases of nervous system 933 (3.2) 399 (2.2) 534 (4.9) 359 (4.6) 175 (5.7)
 I. Infections/parasites 728 (2.5) 492 (2.7) 236 (2.2) 120 (1.5) 116 (3.8)
 X. Diseases of respiratory system 1'440 (4.9) 966 (5.3) 474 (4.3) 367 (4.7) 107 (3.5)
 Other ICD-10 chapters 11,'023 (37.6) 8'851 (48.2) 2'172 (19.9) 1'728 (22.0) 444 (14.5)
 ICU stay n (%) 4'002 (13.7 502 (2.7) 3'500 (32.1) 1'912 (24.4) 1'588 (51.7)
Discharged n (%)
 Home 23,'679 (80.9) 16′767 (91.3) 6′912 (63.4) 5′869 (74.9) 1′043 (34.0)
 Rehab 2'584 (8.8) 521 (2.8) 2'063 (18.9) 1′106 (14.1) 957 (31.2)
 Other hospital 929 (3.2) 219 (1.2) 710 (6.5) 343 (4.4) 367 (12.0)
 Nursing home 599 (2.0) 190 (1.0) 409 (3.8) 172 (2.2) 237 (7.7)
 Others service 266 (0.9) 120 (0.7) 146 (1.3) 57 (0.7) 89 (2.9)
 Missing 503 (1.7) 279 (1.5) 224 (2.1) 131 (1.7) 93 (3.0)
 Re-admissions n (%) 910 (3.1) 546 (3.0) 364 (3.3) 252 (3.2) 112 (3.6)
Outcomes
 Hospital mortality n (%) 718 (2.5) 276 (1.5) 442 (4.1) 159 (2.0) 283 (9.2)
 LOS in the hospital d median [Q1, Q3] 5.00 [3, 10] 4 [3, 7] 8 [4, 15 7 [4, 12] 13 [7, 23],
 Nursing hours per case h median [Q1, Q3] 30.1 [17.7, 59.5] 24.1 [15.7, 39.9] 52.5 [26.0, 107.7] 41.0 [22.2, 76.0] 114.5 [56.7, 240.5]
 Cost per case CHF 11′128 [6′667, 22′861] 8′764 [5′788, 14′515] 20′875, [10′463, 42′271] 16′662 [9067, 32′413] 40′259 [19′235, 80′245]
  1. Legend: DOS delirium observation scale; ICDSC intensive care delirium screening checklist; ICU intensive care unit